leave.c revision 78717 
1/*
2 * Copyright (c) 1980, 1988, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1980, 1988, 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)leave.c	8.1 (Berkeley) 6/6/93";
43#endif
44static const char rcsid[] =
45  "$FreeBSD: head/usr.bin/leave/leave.c 78717 2001-06-24 19:41:18Z dd $";
46#endif /* not lint */
47
48#include <err.h>
49#include <ctype.h>
50#include <locale.h>
51#include <stdio.h>
52#include <stdlib.h>
53#include <time.h>
54#include <unistd.h>
55
56void doalarm __P((u_int));
57static void usage __P((void));
58
59/*
60 * leave [[+]hhmm]
61 *
62 * Reminds you when you have to leave.
63 * Leave prompts for input and goes away if you hit return.
64 * It nags you like a mother hen.
65 */
66int
67main(argc, argv)
68	int argc;
69	char **argv;
70{
71	register u_int secs;
72	register int hours, minutes;
73	register char c, *cp = NULL;
74	struct tm *t;
75	time_t now;
76	int plusnow, t_12_hour;
77	char buf[50];
78
79	if (setlocale(LC_TIME, "") == NULL)
80		warn("setlocale");
81
82	if (argc < 2) {
83#define	MSG1	"When do you have to leave? "
84		(void)write(1, MSG1, sizeof(MSG1) - 1);
85		cp = fgets(buf, sizeof(buf), stdin);
86		if (cp == NULL || *cp == '\n')
87			exit(0);
88	} else if (argc > 2)
89		usage();
90	else
91		cp = argv[1];
92
93	if (*cp == '+') {
94		plusnow = 1;
95		++cp;
96	} else
97		plusnow = 0;
98
99	for (hours = 0; (c = *cp) && c != '\n'; ++cp) {
100		if (!isdigit(c))
101			usage();
102		hours = hours * 10 + (c - '0');
103	}
104	minutes = hours % 100;
105	hours /= 100;
106
107	if (minutes < 0 || minutes > 59)
108		usage();
109	if (plusnow)
110		secs = hours * 60 * 60 + minutes * 60;
111	else {
112		(void)time(&now);
113		t = localtime(&now);
114
115		if (hours > 23)
116			usage();
117
118		/* Convert tol to 12 hr time (0:00...11:59) */
119		if (hours > 11)
120			hours -= 12;
121
122		/* Convert tm to 12 hr time (0:00...11:59) */
123		if (t->tm_hour > 11)
124			t_12_hour = t->tm_hour - 12;
125		else
126			t_12_hour = t->tm_hour;
127
128		if (hours < t_12_hour ||
129	 	   (hours == t_12_hour && minutes <= t->tm_min))
130			/* Leave time is in the past so we add 12 hrs */
131			hours += 12;
132
133		secs = (hours - t_12_hour) * 60 * 60;
134		secs += (minutes - t->tm_min) * 60;
135		secs -= now % 60;	/* truncate (now + secs) to min */
136	}
137	doalarm(secs);
138	exit(0);
139}
140
141void
142doalarm(secs)
143	u_int secs;
144{
145	register int bother;
146	time_t daytime;
147	char tb[80];
148	int pid;
149
150	if ((pid = fork())) {
151		(void)time(&daytime);
152		daytime += secs;
153		strftime(tb, sizeof(tb), "%+", localtime(&daytime));
154		printf("Alarm set for %s. (pid %d)\n", tb, pid);
155		exit(0);
156	}
157	sleep((u_int)2);		/* let parent print set message */
158	if (secs >= 2)
159		secs -= 2;
160
161	/*
162	 * if write fails, we've lost the terminal through someone else
163	 * causing a vhangup by logging in.
164	 */
165#define	FIVEMIN	(5 * 60)
166#define	MSG2	"\07\07You have to leave in 5 minutes.\n"
167	if (secs >= FIVEMIN) {
168		sleep(secs - FIVEMIN);
169		if (write(1, MSG2, sizeof(MSG2) - 1) != sizeof(MSG2) - 1)
170			exit(0);
171		secs = FIVEMIN;
172	}
173
174#define	ONEMIN	(60)
175#define	MSG3	"\07\07Just one more minute!\n"
176	if (secs >= ONEMIN) {
177		sleep(secs - ONEMIN);
178		if (write(1, MSG3, sizeof(MSG3) - 1) != sizeof(MSG3) - 1)
179			exit(0);
180	}
181
182#define	MSG4	"\07\07Time to leave!\n"
183	for (bother = 10; bother--;) {
184		sleep((u_int)ONEMIN);
185		if (write(1, MSG4, sizeof(MSG4) - 1) != sizeof(MSG4) - 1)
186			exit(0);
187	}
188
189#define	MSG5	"\07\07That was the last time I'll tell you.  Bye.\n"
190	(void)write(1, MSG5, sizeof(MSG5) - 1);
191	exit(0);
192}
193
194static void
195usage()
196{
197	fprintf(stderr, "usage: leave [[+]hhmm]\n");
198	exit(1);
199}
200